Personally, I see nothing Russian or Caucasian here. IMHO ,this is a garden variety Ottoman officer 19-20 century sword  with perhaps a “blingy” silver handle ( or just silver plated). The inscription is most likely in old Turkish  that is unreadable by modern Turks :  at least half a dozen of my colleagues from Turkey and their highly educated kin  in Turkey just shrugged their shoulders. Perhaps, a university professor of old Ottoman might be of help. 
 
Decorative style is not informative: most decorated Ottoman swords of that period were embellished in “Turkish Baroque” style. And if it’s ain’t Baroque, don’t fix it:-)
		 
		
		
		
		
		
		
		
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